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avcodec/hq_hqa: Check remaining input bits in hqa_decode_mb()

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Fixes: Timeout
Fixes: 9634/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HQ_HQA_fuzzer-6267852259590144

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-08-20 22:53:32 +02:00
parent 1cbac9ce20
commit c9222b972d
1 changed files with 3 additions and 0 deletions
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3
libavcodec/hq_hqa.c
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@ -181,6 +181,9 @@ static int hqa_decode_mb(HQContext *c, AVFrame *pic, int qgroup,
int flag = 0; int flag = 0;
int i, ret, cbp; int i, ret, cbp;
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
cbp = get_vlc2(gb, c->hqa_cbp_vlc.table, 5, 1); cbp = get_vlc2(gb, c->hqa_cbp_vlc.table, 5, 1);
for (i = 0; i < 12; i++) for (i = 0; i < 12; i++)